Furnace for baking ingandescents



" scriptionthereof.

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UNITED f STATES l' PATENT GEEICE.

WILLIAM HENRY BoUL'ron, oF cLEvELAND, oIIIo.A

` FURNACE FOR BAKING lNcAN-DESCENTS.

To @ZZ whom it may concern:

I Be it known that I, WILLIAM HENRY BOUL- TON, of Cleveland, in thecounty of Cuyahoga and State of Ohio, have invented a certain new andImproved Furnace for Baking Carbons for Electric Lights, and I do herebydeclare that the following is a full, clear, and complete de- Thespecial purpose of the above-mentioned furnace is for baking carbonpoints for electric lights, but which invention, however, may be usedforothersimilar purposes, and for annealing metals, &c.

The construction of the furnace is substantially as follows, and asshown in the accompanying drawings, making a part of this specifieation,in whichi' Figure l represents a plan view of the inside of the furnace,theItop being removed for that purpose. Fig. 2 is a vertical transversesection through the line :c x in Fig. l. Fig. 3 is a view of the bottomof the furnace, show-I ing the flues thereof, a portion of the internali I I y structure of the furnacebeing removed that the iiues may beseen. Fig. 4 is a vertical transverse section through the line x x inFig. l.

` nal walls of the furnace, which are constructed of brick. The height,length, and breadth of the structure are arbitrary matters, and

therefore need no specified description in thi place.

B is the fire-place, B the grates, and C the ash-pit. The `nre-place isat one end` of the structure, and the chimney-fines D D at the,

sides b and c of the compartments E F and the walls A A of the furnaceare, respectively, heat-passages cl and e, 'to which further attentionwillbe called hereinafter. The two compartments E and F are incommunication one September 4:, 1 883.

with the' other by a series ofapertures, m, along the upper edge of thepartition-walls G and H, and also by an opening, J, in each of thewalls, as seen in Figs. 4 and 5, in which the two openings are showndirectly opposite each other. The partition-walls G and H and the wallsb and crest upon a supplementary bottom or door, K, Figs. 4 and 5,whereas their upper edges are in close contact with a top or cover, L,which is removableto obtain flues 2` and 3 respectively communicate withthe side fiues, 1 and 4, by means of the pas! sage-ways M and N, Fig. 3.In said figure.

thesupplementary floor or bottom K is shown 'as removed, that theseveralflues may be seen and their relation to each other and to thechimney or chimney-dues `DIand D.

ings.

The practical use of the above ,described `furnace is substantially asfollows: The carbons are placed in the compartments JE and F of theoven. The cover L is then placed on over the compartments and made tightby luting the joints with any suitable material. The heat and gases fromthe nre-place B pass therefrom through the openings t' t', Fig. 2, intothe compartments E and F of the oven, passing andrepassing from one tothe other through the apertures m and J and diffused among the carbonstherein.- The heat, o., not only enters the compartments E andF, butalso passes down the space I between the partitions G and H, and intothe spaces d and e, thereby heating thecontents of the compartments fromboth sides thereof. The heat, gases, smoke, 8m., pass from thecompartments down` throughthe openings a a, Fig. 1, in the supplementarybottom K to the side flues, l and 4, along which the heat and smoke passto the flues 2 and 3, returning therein to the VThe chimney proper isnot shown in the draw- "I IOO o floor K forms the top ofthe flues, andthat the I baked without becoming bent, whereas if the heat is muchgreater on one side of the baking carbons than on the other (which isthe case in the ordinary carbon-furnace) the carbons (more or less ofthem) are bent and harder on one side than on the other, causing them toburn unequally, and therefore imperfectly, rendering the light more orless defective, whichis nearly if not wholly avoided by the nse of thefurnace herein described,

By means of the dampers c and c the draft of the furnace can beregulated and the heat in each chamber separately tempered or shuty off,as may be required from time to time in the process of baking thecarbons, or the whole of the heat may be thrown into one chamber.

What I claim as my invention, and desire to secureby Letters Patent, is

1. In a furnace for baking carbons for elec tric lights, an oven orchamber provided with partition-walls G H,havinglbetween them more orless space, and dividing said oven or chamber into compartments E and F,having an open vand F of the oven or chamber of the furnace hereindescribed, the iiues 1, 2, 3, and 4, the fire-box and chimney-nues,provided with one or' more dampers, substantially as set forth, and forthe purpose specified.

3. In a furnace for carbonizing incandescents, an oven consisting of thecompartments E and F, partition-walls G and II, provided with apertures,side walls, c and b, distant from the incasing-walls A A, flues 1, 2, 3,and 4, re-boX, chi1nney-ilues,dampers, and detachable top or cover L,constructed and arranged in relation to each other substantially asherein set forth.

4. Arranged in relation to and in combina tion with the compartments Eand F, respect ively, the flues 2 and 3, said ues being separated fromeach other by a wall, n', extending into the chimney and dividing thesame into fluescorresponding to the i'lues 2 and 3, substantially asdescribed. v

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM HENRY BOULION.

Witnesses:

J. H. BURRIDGE, W. H. KING.

